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  1. x <- "abc(0)(1)%ile, def(2)(3)(4)%ile(5)%ile"
  2. library(stringr)
  3. result <- str_match(x, "\\bdef(?:\\((\\d+)\\))+%ile")
  4. result[,2]
Success #stdin #stdout 0.29s 42264KB
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Standard input is empty
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[1] "4"
https://ideone.com/lFnbgg
language:
R (R 3.5.2)
created:
3 years ago
visibility:
secret

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